What is Wild Card based Pattern Matching in C# 7.0

Question

What are wild cards used in database for Pattern Matching ?

Answer 1

List<object> objCollection=new List<object>() {10 , 20, null, "hello", 12.5};

foreach( object o in new List<object>() {10 , 20, null, "hello", 12.5})

{
    if( o is *)
     {
Console.WriteLine("Its a match",o);

  }

}

Here * is the wild card that matches all types in C#.